A3

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The Tomos A3 engine is a simple two stroke 49cc engine with a two speed automatic transmission. It is found on Tomos automatic models from the 70's until 1992. Depending on the model of A3 engine, they produce one to two horsepower with a maximum RPM of 4000-5500. This motor uses a Ducati 6v points type ignition. The A3 has a special flywheel alignment pin instead of the traditional woodruff key used by most other moped manufacturers. For more information on this pin, please see the woodruff key page.